Is it all one great big room, or are there open doorways in between? My dining room, kitchen, family room and sun room all run together so I chose colors that compliment each other. Dining (gray), Kitchen and family room (navy) and sunroom (palm green).
If it's all one large room, I'd make it the same color unless you have bumped out walls that only give you a view of one side. I think it looks cool when one wall is painted a different color than others in the same room as a point of focus.